You ignore the pleas of the crippled Saxons and spend a few minutes finishing off the unconscious and crippled.
[OOC: For slaying helpless opponents, Artaigne and Rodric both get Cruel checks in Winter Phase. Rodric also earns a Hate: Saxons check. For the remainder of this day, Rodric has +5 to all attack skills when facing Saxon opponents for successfully engaging his Hate: Saxons passion. So overcome with his hatred of Saxons, he cannot willingly spare any Saxon opponent he faces, even if a ransom could be earned.]
Artaigne secures the chest of coins - more money that he has seen in a long time - and you spend a few minutes setting fire to the ships. There is more river to sweep. Or you could return to Cedwyn and the others now.
[Actions?]
You've been here 15 minutes, killing survivors, looting, and firing the ships.